Gateway FPD1810, Service Manual

Page: 11 / 34

DESCRIPTION OF BLOCK DIAGRAM
- 11 -
1. Input signal switching part.
There are two inputs which are analog and digital input.
They come from each 15 pin D-Sub and 24 pin DVI-D connector.
2. Pre-amp/ ADC / PLL / Video Controller.
This part amplifies the level of video signal for the digital conversion and converts from the analog video signal
to the digital video signal using a pixel clock.
The pixel clock for each mode is generated by the PLL.
The range of the pixel clock is from 25MHz to 135MHz.
This part consists of the Scaler and frame buffers which converts frame rate of input signal to 60Hz frame rate.
The Scaler gets the video signal converted analog to digital, interpolates input to1280 X 1024 resolution signal
and outputs 8-bit R, G, B signal to transmitter.
Especially pre-amp / ADC / Video controller are merged to one chip ‘Gm5020’ by Genesis. Also FRC is
separate.
3. Display Data Transmitter Part.
This part transmit digital signal from the Scaler to the receiver of module.
4. Power Part.
This part consists of the DC/DC converter and two 3.3V and one 2.5 regulators .
The DC/DC converter coverts 12V to be entered power adapter to 5V.
5V, output of DC/DC converter, is supplied to the Micom and 3.3V/2.5V regulators.
The output voltage of 3.3V / 2.5V regulators flow to IC of each part.
5. MICOM Part.
This part consists of EEPROM IC which stores control data, Reset IC and the Micom.
The Micom distinguishes polarity and frequency of the H/V sync are supplied from signal cable.
The controlled data of each modes is stored in EEPROM.
6. Inverter
The inverter converts from DC12V to AC 700V and operate back-light lamp of module.